Beyan tyson



B. TYSON. Gold Saving Apparatus.

No. 229,650. Patented July 6,1880.

UNITED STATES PATENT OFFICE.

BRYAN TYSON, OF WASHINGTON, DISTRICT OF COLUMBIA.

GOLD-SAVIING APPARATUS.

SPECIFICATION forming" part of Letters Patent No. 229,650, dated July 6,1880. Application filed October 1 7, 1879.

To all whom it may concern:

Be it known that I, BRYAN TYSON, of Washin gton, District of Columbia,have invented a Gold-Saving Apparatus; and I hereby declare thefollowing to be a full, clear, and exact description thereof.

' My invention relates to certain improvements in apparatus for savingthe precious metals, quicksilver, &c., which may be contained in pulp,tailings, or other form of pulverized ore; and it consists in anadjustable trap located in the main flume to lead the tailv ings to ashort sluice provided with transverse fixed and movable riffle-bars, thetailings then passing to an oscillating pan or jigger for concentration,which will be more fully described by referring to the accompanyingdrawings, in which- Figure 1 is a view of my apparatus. Fig. 2 is asection of the jigger.

A is a trough, which may receive the tailin gs or material from what isknown as the undercurrent of a sluice, or it may in some cases take itdirectly from the flume or sluice. The bottom of this trough may beformed of iron plates B, as shown. This bottom extends a certaindistance along the trough, where it ceases. At this point an angularplate, l, is fitted into the trough so that its upper edge stands ashort distance in front of the bottom plates and projects a little abovethem.

The plate or plates 0 are secured to an inclined partition which extendsacross the trough between the upper and lower floors, B B, of the flume,and it may be adjusted so that its upper edge will stand higher orlower, as desired, and also to limit the size of the opening C, throughwhich the heavier particles fall. This adjustment is most easilyaccomplished by means of a slot or slots in the lower part of the plate0 and a set screw or nut which passes through this slot. By looseningthis nut the plate may be raised or lowered, and again secured bytightening the nut. This edge acts as a sort of skimmer, and separatesthe heavier material from the lighter. The latter, after passing overthis edge, falls into the trough at B beyond, it being considerablylower, as shown, and may be thence discharged. The heavier portions fallinto a receptacle, D, beneath the bottom B, and, being stirred up andkept from packing a flow of water, will pass over the transversegratebars E E, which extend across the flume F, a little above itsbottom. The bars E are so mounted that by the aid of arms they may beoscillated, and thus stir up the material and prevent it from packingand becoming solid, at the same time allowing the quicksilver andamalgam to settle to the bottom, to be afterward collected. From thisseries of gratebars and the succeeding stationary bars E the materialrises over an incline at H, Which tends to hold a certain quantity ofsand all the time in the flume, and, passing across a level space, I,with a series of transverse slots or grooved rifiies, J, falls intoanotherdepressed receptacle, M. passes into a transverse trough, L,which conveys it to an inclined sluice, N.

The lower end of this sluice is provided with an angular adjustableskimming-plate, 0, similar to that described at G in the sluice A. Thelighter valueless portions are discharged over this plate, while all theheavier portions Will be detained, and, falling into the sluice P, willbe discharged byit into the pan or jiggerQ. This pan consists of theouter portion, Q, and two or more concentric inner cylinders, U X, whichare secured to the same bottom, so as to oscillate together. Thecylinders U and X are successively lower than the outer pan, Q, so thatthe discharge will eventually take place through the inner cylinder,which is either bottomless or has an opening of sufficient size madethrough it to permit the escape of the tailings.

R is a plate for the reception of concentrations as they pass from thesluice-box P, and S is an upright flange upon this plate. The plate Itprojects from a flange, T, which surrounds the top of the inneroscillating cylinder, U, as shown Just beneath this flange is thecircular stationary rim V, which is supported from the frame-work aboveby the rods Z Z. This rim may be plain, or it may be subdivided byangular plates upon the top, having their broader ends in ward, or itmay have From this point the material a plate or flange on the top, asshown. At the point where this rim passes beneath the plate R, I form alug or projection, W, which prevents the sand from becoming packedbeneath the plate It.

The flange T, before mentioned, may have its outer edge in an octagon orother form and slightly depressed below its point of attachment to theinner cylinder. to facilitate the process of concentration. The edge ofthe cylinder U stands a little above the rim or flange T, and thusretains a stratum of sand upon it all the time.

The innermost cylinder of all, X, may have arim and flange similar tothose connected with the cylinder U.

Y Y are pipes having discharge nozzles above the plate R, and theprocess is aided by the action of this water.

A vertical shaft, a, is here shown as the driver for the differentmoving parts. Upon the top of this shaft is a crank, b, and a pitmanfrom this crank connects with a sliding guide, 0, or it may connectdirectly with the rocker-arms (I upon the ends of the oscillatinggrate-bars E in the sluice F. These gratebars, it will be manifest, maybe made of any desired form which will act to the best advantage.

A gear-wheel, 0, upon the shaft a meshes with the pinion f upon theshaft g, and a crank, h, upon this shaft is connected by a pitman, i,with the rocker-arm j, by which the jigger or pan Q is caused tooscillate at any desired rate of speed.

The operation of the apparatus will then be as follows: The sand ortailings containing valuable metals is allowed to flow down the sluiceor trough A, and the plate or skimmer (J intercepts all the morevaluable heavier portions, and causes them to fall into the receptacle1), from whence they pass over the bridge or dam l) to the trough orsluice F, containing the oscillating and stationary ritlie or grate barsE. After passing these bars a second dam, at H, causes the material torise and flow over the rifiie-bars K, with their intermediate spaces, J,after which it flows into the transverse trough or sluice L, and iscarried to the jigger either directly or by means of other sluices, N P.A second angular skimmingplate, (),is interposed between theconveyingsluice and the jigger, so that only the more valuable andconcentrated portions are conveyed to the jigger.

It will be manifest that as many sets of preliminary concentratingdevices may be employed as are necessary to properly concentrate thematerial before it reaches the pan orjigger, where it falls upon theplate R. The vertical flange S holds the material at the circumferenceand prevents a too rapid flow toward the central discharge-opening, andalso tends to precipitate the precious metals upon the plate beforepassing off into the pan.

The action of the stationary rim V, in conjunction with the oscillatingoctagonal rim or flange T, is to keep up a constant agitation of thematerial at and near the surface, and thus assist in the precipitationof the precious metals. Thus above the stationary rim V the sands willbe nearly stationary, while a rapid motion takes places above the rim orflange T. Between the two a peculiar horizontal action takes place. Theflange T being depressed at its outer edge, the precious metal willslide off to a place of safety as soon as concentrated upon its surface,and this action is facilitated by allowing the edge of the cylinder U toproject slightly above the plate.

The effect produced in this jigger is thus to thoroughly agitate thematerial near the surface, from which also the discharge takes place,and thus assists to work the precious metals down to a place of safety.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. The trough A, with its bottom B B, and the chamber D, as shown, incombination with the angular plate 0, having its upper edge madeadjustable with reference to the bottom B and the opening into thechamber D by the slot and nut, substantially as and for the purposeherein described.

2. The trough A, with its angular plate or skimmer U, the receptacle D,and the dam D, in combination with the flume F, with its grate-bars E E,substantially as and for the purpose herein described.

3. The flume F, with its transverse dams D and H, in combination withthe angular or other shaped transverse oscillating riffle-bars E,substantially as and for the purpose herein described.

4. The sluice A, with its separating or skimming plate 0, the receptacleD, sluice F, with its movable and stationary riffle-bars E E, and thefinal angular plate or skimmer O, in combination with the oscillatingpan or jigger Q, substantially as herein described.

5. The pan consisting of the concentric cylindersQ U X, successivelydecreasing in height toward the center and having the dischargeopeningthrough the inner cylinder, the angular rim or flange T, with itsprojecting plate R, for receiving the material from the sluice, and thevertical plate or flange S, in combination with the sluices N P,substantially as herein described.

6. The pan or jigger Q, having the inclined angular rim or flange Tprojecting around the cylinder U, below its upper edge, as shown, in

combination with the stationary rim or ring V beneath the flange, andacting in conjunction with it to settle and deposit the precious metals,substantially as herein described.

In witness whereof I have hereunto set my hand.

BRYAN TYSON.

Witnesses 5. H. N oonsn, FRANK A. Bacon's.

Ils

